Inclusive search for standard model Higgs boson production in the WW decay channel using the CDF II detector.
T Aaltonen, J Adelman, B Alvarez González, S Amerio, D Amidei, A Anastassov, A Annovi, J Antos, G Apollinari, J Appel, A Apresyan, T Arisawa, A Artikov, J Asaadi, W Ashmanskas, A Attal, A Aurisano, F Azfar, W Badgett, A Barbaro-Galtieri, V E Barnes, B A Barnett, P Barria, P Bartos, G Bauer, P-H Beauchemin, F Bedeschi, D Beecher, S Behari, G Bellettini, J Bellinger, D Benjamin, A Beretvas, A Bhatti, M Binkley, D Bisello, I Bizjak, R E Blair, C Blocker, B Blumenfeld, A Bocci, A Bodek, V Boisvert, D Bortoletto, J Boudreau, A Boveia, B Brau, A Bridgeman, L Brigliadori, C Bromberg, E Brubaker, J Budagov, H S Budd, S Budd, K Burkett, G Busetto, P Bussey, A Buzatu, K L Byrum, S Cabrera, C Calancha, S Camarda, M Campanelli, M Campbell, F Canelli, A Canepa, B Carls, D Carlsmith, R Carosi, S Carrillo, S Carron, B Casal, M Casarsa, A Castro, P Catastini, D Cauz, V Cavaliere, M Cavalli-Sforza, A Cerri, L Cerrito, S H Chang, Y C Chen, M Chertok, G Chiarelli, G Chlachidze, F Chlebana, K Cho, D Chokheli, J P Chou, K Chung, W H Chung, Y S Chung, T Chwalek, C I Ciobanu, M A Ciocci, A Clark, D Clark, G Compostella, M E Convery, J Conway, M Corbo, M Cordelli, C A Cox, D J Cox, F Crescioli, C Cuenca Almenar, J Cuevas, R Culbertson, J C Cully, D Dagenhart, N d'Ascenzo, M Datta, T Davies, P de Barbaro, S De Cecco, A Deisher, G De Lorenzo, M Dell'Orso, C Deluca, L Demortier, J Deng, M Deninno, M d'Errico, A Di Canto, B Di Ruzza, J R Dittmann, M D'Onofrio, S Donati, P Dong, T Dorigo, S Dube, K Ebina, A Elagin, R Erbacher, D Errede, S Errede, N Ershaidat, R Eusebi, H C Fang, S Farrington, W T Fedorko, R G Feild, M Feindt, J P Fernandez, C Ferrazza, R Field, G Flanagan, R Forrest, M J Frank, M Franklin, J C Freeman, I Furic, M Gallinaro, J Galyardt, F Garberson, J E Garcia, A F Garfinkel, P Garosi, H Gerberich, D Gerdes, A Gessler, S Giagu, V Giakoumopoulou, P Giannetti, K Gibson, J L Gimmell, C M Ginsburg, N Giokaris, M Giordani, P Giromini, M Giunta, G Giurgiu, V Glagolev, D Glenzinski, M Gold, N Goldschmidt, A Golossanov, G Gomez, G Gomez-Ceballos, M Goncharov, O González, I Gorelov, A T Goshaw, K Goulianos, A Gresele, S Grinstein, C Grosso-Pilcher, R C Group, U Grundler, J Guimaraes da Costa, Z Gunay-Unalan, C Haber, S R Hahn, E Halkiadakis, B-Y Han, J Y Han, F Happacher, K Hara, D Hare, M Hare, R F Harr, M Hartz, K Hatakeyama, C Hays, M Heck, J Heinrich, M Herndon, J Heuser, S Hewamanage, D Hidas, C S Hill, D Hirschbuehl, A Hocker, S Hou, M Houlden, S-C Hsu, R E Hughes, M Hurwitz, U Husemann, M Hussein, J Huston, J Incandela, G Introzzi, M Iori, A Ivanov, E James, D Jang, B Jayatilaka, E J Jeon, M K Jha, S Jindariani, W Johnson, M Jones, K K Joo, S Y Jun, J E Jung, T R Junk, T Kamon, D Kar, P E Karchin, Y Kato, R Kephart, W Ketchum, J Keung, V Khotilovich, B Kilminster, D H Kim, H S Kim, H W Kim, J E Kim, M J Kim, S B Kim, S H Kim, Y K Kim, N Kimura, L Kirsch, S Klimenko, K Kondo, D J Kong, J Konigsberg, A Korytov, A V Kotwal, M Kreps, J Kroll, D Krop, N Krumnack, M Kruse, V Krutelyov, T Kuhr, N P Kulkarni, M Kurata, S Kwang, A T Laasanen, S Lami, S Lammel, M Lancaster, R L Lander, K Lannon, A Lath, G Latino, I Lazzizzera, T LeCompte, E Lee, H S Lee, J S Lee, S W Lee, S Leone, J D Lewis, C-J Lin, J Linacre, M Lindgren, E Lipeles, A Lister, D O Litvintsev, C Liu, T Liu, N S Lockyer, A Loginov, L Lovas, D Lucchesi, J Lueck, P Lujan, P Lukens, G Lungu, J Lys, R Lysak, D MacQueen, R Madrak, K Maeshima, K Makhoul, P Maksimovic, S Malde, S Malik, G Manca, A Manousakis-Katsikakis, F Margaroli, C Marino, C P Marino, A Martin, V Martin, M Martínez, R Martínez-Ballarín, P Mastrandrea, M Mathis, M E Mattson, P Mazzanti, K S McFarland, P McIntyre, R McNulty, A Mehta, P Mehtala, A Menzione, C Mesropian, T Miao, D Mietlicki, N Miladinovic, R Miller, C Mills, M Milnik, A Mitra, G Mitselmakher, H Miyake, S Moed, N Moggi, M N Mondragon, C S Moon, R Moore, M J Morello, J Morlock, P Movilla Fernandez, J Mülmenstädt, A Mukherjee, Th Muller, P Murat, M Mussini, J Nachtman, Y Nagai, J Naganoma, K Nakamura, I Nakano, A Napier, J Nett, C Neu, M S Neubauer, S Neubauer, J Nielsen, L Nodulman, M Norman, O Norniella, E Nurse, L Oakes, S H Oh, Y D Oh, I Oksuzian, T Okusawa, R Orava, K Osterberg, S Pagan Griso, C Pagliarone, E Palencia, V Papadimitriou, A Papaikonomou, A A Paramanov, B Parks, S Pashapour, J Patrick, G Pauletta, M Paulini, C Paus, T Peiffer, D E Pellett, A Penzo, T J Phillips, G Piacentino, E Pianori, L Pinera, K Pitts, C Plager, L Pondrom, K Potamianos, O Poukhov, F Prokoshin, A Pronko, F Ptohos, E Pueschel, G Punzi, J Pursley, J Rademacker, A Rahaman, V Ramakrishnan, N Ranjan, I Redondo, P Renton, M Renz, M Rescigno, S Richter, F Rimondi, L Ristori, A Robson, T Rodrigo, T Rodriguez, E Rogers, S Rolli, R Roser, M Rossi, R Rossin, P Roy, A Ruiz, J Russ, V Rusu, B Rutherford, H Saarikko, A Safonov, W K Sakumoto, L Santi, L Sartori, K Sato, V Saveliev, A Savoy-Navarro, P Schlabach, A Schmidt, E E Schmidt, M A Schmidt, M P Schmidt, M Schmitt, T Schwarz, L Scodellaro, A Scribano, F Scuri, A Sedov, S Seidel, Y Seiya, A Semenov, L Sexton-Kennedy, F Sforza, A Sfyrla, S Z Shalhout, T Shears, P F Shepard, M Shimojima, S Shiraishi, M Shochet, Y Shon, I Shreyber, A Simonenko, P Sinervo, A Sisakyan, A J Slaughter, J Slaunwhite, K Sliwa, J R Smith, F D Snider, R Snihur, A Soha, S Somalwar, V Sorin, P Squillacioti, M Stanitzki, R St Denis, B Stelzer, O Stelzer-Chilton, D Stentz, J Strologas, G L Strycker, J S Suh, A Sukhanov, I Suslov, A Taffard, R Takashima, Y Takeuchi, R Tanaka, J Tang, M Tecchio, P K Teng, J Thom, J Thome, G A Thompson, E Thomson, P Tipton, P Ttito-Guzmán, S Tkaczyk, D Toback, S Tokar, K Tollefson, T Tomura, D Tonelli, S Torre, D Torretta, P Totaro, M Trovato, S-Y Tsai, Y Tu, N Turini, F Ukegawa, S Uozumi, N van Remortel, A Varganov, E Vataga, F Vázquez, G Velev, C Vellidis, M Vidal, I Vila, R Vilar, M Vogel, I Volobouev, G Volpi, P Wagner, R G Wagner, R L Wagner, W Wagner, J Wagner-Kuhr, T Wakisaka, R Wallny, S M Wang, A Warburton, D Waters, M Weinberger, J Weinelt, W C Wester, B Whitehouse, D Whiteson, A B Wicklund, E Wicklund, S Wilbur, G Williams, H H Williams, P Wilson, B L Winer, P Wittich, S Wolbers, C Wolfe, H Wolfe, T Wright, X Wu, F Würthwein, A Yagil, K Yamamoto, J Yamaoka, U K Yang, Y C Yang, W M Yao, G P Yeh, K Yi, J Yoh, K Yorita, T Yoshida, G B Yu, I Yu, S S Yu, J C Yun, A Zanetti, Y Zeng, X Zhang, Y Zheng, S Zucchelli
ABSTRACT We present a search for standard model (SM) Higgs boson production using pp collision data at square root(s) = 1.96 TeV, collected with the CDF II detector and corresponding to an integrated luminosity of 4.8 fb(-1). We search for Higgs bosons produced in all processes with a significant production rate and decaying to two W bosons. We find no evidence for SM Higgs boson production and place upper limits at the 95% confidence level on the SM production cross section (sigma(H)) for values of the Higgs boson mass (sigma(H)) in the range from 110 to 200 GeV. These limits are the most stringent for m(H) > 130 GeV and are 1.29 above the predicted value of sigma(H) for c = 165 GeV.
-
Citations (0)
-
Cited In (0)
Page 1
arXiv:1001.4468v2 [hep-ex] 17 Feb 2010
Inclusive Search for Standard Model Higgs Boson Production in the WW Decay
Channel using the CDF II Detector
T. Aaltonen,24J. Adelman,14B.´Alvarez Gonz´ alezw,12S. Amerioee,44D. Amidei,35A. Anastassov,39A. Annovi,20
J. Antos,15G. Apollinari,18J. Appel,18A. Apresyan,49T. Arisawa,58A. Artikov,16J. Asaadi,54W. Ashmanskas,18
A. Attal,4A. Aurisano,54F. Azfar,43W. Badgett,18A. Barbaro-Galtieri,29V.E. Barnes,49B.A. Barnett,26
P. Barriagg,47P. Bartos,15G. Bauer,33P.-H. Beauchemin,34F. Bedeschi,47D. Beecher,31S. Behari,26
G. Bellettiniff,47J. Bellinger,60D. Benjamin,17A. Beretvas,18A. Bhatti,51M. Binkley,18D. Biselloee,44
I. Bizjakkk,31R.E. Blair,2C. Blocker,7B. Blumenfeld,26A. Bocci,17A. Bodek,50V. Boisvert,50D. Bortoletto,49
J. Boudreau,48A. Boveia,11B. Braua,11A. Bridgeman,25L. Brigliadoridd,6C. Bromberg,36E. Brubaker,14
J. Budagov,16H.S. Budd,50S. Budd,25K. Burkett,18G. Busettoee,44P. Bussey,22A. Buzatu,34K. L. Byrum,2
S. Cabreray,17C. Calancha,32S. Camarda,4M. Campanelli,31M. Campbell,35F. Canelli14,18A. Canepa,46
B. Carls,25D. Carlsmith,60R. Carosi,47S. Carrillon,19S. Carron,18B. Casal,12M. Casarsa,18A. Castrodd,6
P. Catastinigg,47D. Cauz,55V. Cavalieregg,47M. Cavalli-Sforza,4A. Cerri,29L. Cerritoq,31S.H. Chang,28
Y.C. Chen,1M. Chertok,8G. Chiarelli,47G. Chlachidze,18F. Chlebana,18K. Cho,28D. Chokheli,16J.P. Chou,23
K. Chungo,18W.H. Chung,60Y.S. Chung,50T. Chwalek,27C.I. Ciobanu,45M.A. Cioccigg,47A. Clark,21D. Clark,7
G. Compostella,44M.E. Convery,18J. Conway,8M.Corbo,45M. Cordelli,20C.A. Cox,8D.J. Cox,8F. Crescioliff,47
C. Cuenca Almenar,61J. Cuevasw,12R. Culbertson,18J.C. Cully,35D. Dagenhart,18N. d’Ascenzov,45M. Datta,18
T. Davies,22P. de Barbaro,50S. De Cecco,52A. Deisher,29G. De Lorenzo,4M. Dell’Orsoff,47C. Deluca,4
L. Demortier,51J. Dengf,17M. Deninno,6M. d’Erricoee,44A. Di Cantoff,47B. Di Ruzza,47J.R. Dittmann,5
M. D’Onofrio,4S. Donatiff,47P. Dong,18T. Dorigo,44S. Dube,53K. Ebina,58A. Elagin,54R. Erbacher,8
D. Errede,25S. Errede,25N. Ershaidatcc,45R. Eusebi,54H.C. Fang,29S. Farrington,43W.T. Fedorko,14R.G. Feild,61
M. Feindt,27J.P. Fernandez,32C. Ferrazzahh,47R. Field,19G. Flanagans,49R. Forrest,8M.J. Frank,5M. Franklin,23
J.C. Freeman,18I. Furic,19M. Gallinaro,51J. Galyardt,62F. Garberson,11J.E. Garcia,21A.F. Garfinkel,49
P. Garosigg,47H. Gerberich,25D. Gerdes,35A. Gessler,27S. Giaguii,52V. Giakoumopoulou,3P. Giannetti,47
K. Gibson,48J.L. Gimmell,50C.M. Ginsburg,18N. Giokaris,3M. Giordanijj,55P. Giromini,20M. Giunta,47
G. Giurgiu,26V. Glagolev,16D. Glenzinski,18M. Gold,38N. Goldschmidt,19A. Golossanov,18G. Gomez,12
G. Gomez-Ceballos,33M. Goncharov,33O. Gonz´ alez,32I. Gorelov,38A.T. Goshaw,17K. Goulianos,51A. Greseleee,44
S. Grinstein,4C. Grosso-Pilcher,14R.C. Group,18U. Grundler,25J. Guimaraes da Costa,23Z. Gunay-Unalan,36
C. Haber,29S.R. Hahn,18E. Halkiadakis,53B.-Y. Han,50J.Y. Han,50F. Happacher,20K. Hara,56D. Hare,53
M. Hare,57R.F. Harr,59M. Hartz,48K. Hatakeyama,5C. Hays,43M. Heck,27J. Heinrich,46M. Herndon,60
J. Heuser,27S. Hewamanage,5D. Hidas,53C.S. Hillc,11D. Hirschbuehl,27A. Hocker,18S. Hou,1M. Houlden,30
S.-C. Hsu,29R.E. Hughes,40M. Hurwitz,14U. Husemann,61M. Hussein,36J. Huston,36J. Incandela,11G. Introzzi,47
M. Ioriii,52A. Ivanovp,8E. James,18D. Jang,62B. Jayatilaka,17E.J. Jeon,28M.K. Jha,6S. Jindariani,18
W. Johnson,8M. Jones,49K.K. Joo,28S.Y. Jun,62J.E. Jung,28T.R. Junk,18T. Kamon,54D. Kar,19P.E. Karchin,59
Y. Katom,42R. Kephart,18W. Ketchum,14J. Keung,46V. Khotilovich,54B. Kilminster,18D.H. Kim,28H.S. Kim,28
H.W. Kim,28J.E. Kim,28M.J. Kim,20S.B. Kim,28S.H. Kim,56Y.K. Kim,14N. Kimura,58L. Kirsch,7
S. Klimenko,19K. Kondo,58D.J. Kong,28J. Konigsberg,19A. Korytov,19A.V. Kotwal,17M. Kreps,27J. Kroll,46
D. Krop,14N. Krumnack,5M. Kruse,17V. Krutelyov,11T. Kuhr,27N.P. Kulkarni,59M. Kurata,56S. Kwang,14
A.T. Laasanen,49S. Lami,47S. Lammel,18M. Lancaster,31R.L. Lander,8K. Lannonu,40A. Lath,53G. Latinogg,47
I. Lazzizzeraee,44T. LeCompte,2E. Lee,54H.S. Lee,14J.S. Lee,28S.W. Leex,54S. Leone,47J.D. Lewis,18
C.-J. Lin,29J. Linacre,43M. Lindgren,18E. Lipeles,46A. Lister,21D.O. Litvintsev,18C. Liu,48T. Liu,18
N.S. Lockyer,46A. Loginov,61L. Lovas,15D. Lucchesiee,44J. Lueck,27P. Lujan,29P. Lukens,18G. Lungu,51
J. Lys,29R. Lysak,15D. MacQueen,34R. Madrak,18K. Maeshima,18K. Makhoul,33P. Maksimovic,26S. Malde,43
S. Malik,31G. Mancae,30A. Manousakis-Katsikakis,3F. Margaroli,49C. Marino,27C.P. Marino,25A. Martin,61
V. Martink,22M. Mart´ ınez,4R. Mart´ ınez-Ballar´ ın,32P. Mastrandrea,52M. Mathis,26M.E. Mattson,59P. Mazzanti,6
K.S. McFarland,50P. McIntyre,54R. McNultyj,30A. Mehta,30P. Mehtala,24A. Menzione,47C. Mesropian,51
T. Miao,18D. Mietlicki,35N. Miladinovic,7R. Miller,36C. Mills,23M. Milnik,27A. Mitra,1G. Mitselmakher,19
H. Miyake,56S. Moed,23N. Moggi,6M.N. Mondragonn,18C.S. Moon,28R. Moore,18M.J. Morello,47J. Morlock,27
P. Movilla Fernandez,18J. M¨ ulmenst¨ adt,29A. Mukherjee,18Th. Muller,27P. Murat,18M. Mussinidd,6
J. Nachtmano,18Y. Nagai,56J. Naganoma,56K. Nakamura,56I. Nakano,41A. Napier,57J. Nett,60C. Neuaa,46
Page 2
2
M.S. Neubauer,25S. Neubauer,27J. Nielseng,29L. Nodulman,2M. Norman,10O. Norniella,25E. Nurse,31
L. Oakes,43S.H. Oh,17Y.D. Oh,28I. Oksuzian,19T. Okusawa,42R. Orava,24K. Osterberg,24S. Pagan Grisoee,44
C. Pagliarone,55E. Palencia,18V. Papadimitriou,18A. Papaikonomou,27A.A. Paramanov,2B. Parks,40
S. Pashapour,34J. Patrick,18G. Paulettajj,55M. Paulini,62C. Paus,33T. Peiffer,27D.E. Pellett,8A. Penzo,55
T.J. Phillips,17G. Piacentino,47E. Pianori,46L. Pinera,19K. Pitts,25C. Plager,9L. Pondrom,60K. Potamianos,49
O. Poukhov∗,16F. Prokoshinz,16A. Pronko,18F. Ptohosi,18E. Pueschel,62G. Punziff,47J. Pursley,60
J. Rademackerc,43A. Rahaman,48V. Ramakrishnan,60N. Ranjan,49I. Redondo,32P. Renton,43M. Renz,27
M. Rescigno,52S. Richter,27F. Rimondidd,6L. Ristori,47A. Robson,22T. Rodrigo,12T. Rodriguez,46E. Rogers,25
S. Rolli,57R. Roser,18M. Rossi,55R. Rossin,11P. Roy,34A. Ruiz,12J. Russ,62V. Rusu,18B. Rutherford,18
H. Saarikko,24A. Safonov,54W.K. Sakumoto,50L. Santijj,55L. Sartori,47K. Sato,56V. Savelievv,45
A. Savoy-Navarro,45P. Schlabach,18A. Schmidt,27E.E. Schmidt,18M.A. Schmidt,14M.P. Schmidt∗,61
M. Schmitt,39T. Schwarz,8L. Scodellaro,12A. Scribanogg,47F. Scuri,47A. Sedov,49S. Seidel,38Y. Seiya,42
A. Semenov,16L. Sexton-Kennedy,18F. Sforzaff,47A. Sfyrla,25S.Z. Shalhout,59T. Shears,30P.F. Shepard,48
M. Shimojimat,56S. Shiraishi,14M. Shochet,14Y. Shon,60I. Shreyber,37A. Simonenko,16P. Sinervo,34
A. Sisakyan,16A.J. Slaughter,18J. Slaunwhite,40K. Sliwa,57J.R. Smith,8F.D. Snider,18R. Snihur,34A. Soha,18
S. Somalwar,53V. Sorin,4P. Squillaciotigg,47M. Stanitzki,61R. St. Denis,22B. Stelzer,34O. Stelzer-Chilton,34
D. Stentz,39J. Strologas,38G.L. Strycker,35J.S. Suh,28A. Sukhanov,19I. Suslov,16A. Taffardf,25R. Takashima,41
Y. Takeuchi,56R. Tanaka,41J. Tang,14M. Tecchio,35P.K. Teng,1J. Thomh,18J. Thome,62G.A. Thompson,25
E. Thomson,46P. Tipton,61P. Ttito-Guzm´ an,32S. Tkaczyk,18D. Toback,54S. Tokar,15K. Tollefson,36T. Tomura,56
D. Tonelli,18S. Torre,20D. Torretta,18P. Totarojj,55M. Trovatohh,47S.-Y. Tsai,1Y. Tu,46N. Turinigg,47
F. Ukegawa,56S. Uozumi,28N. van Remortelb,24A. Varganov,35E. Vatagahh,47F. V´ azquezn,19G. Velev,18
C. Vellidis,3M. Vidal,32I. Vila,12R. Vilar,12M. Vogel,38I. Volobouevx,29G. Volpiff,47P. Wagner,46R.G. Wagner,2
R.L. Wagner,18W. Wagnerbb,27J. Wagner-Kuhr,27T. Wakisaka,42R. Wallny,9S.M. Wang,1A. Warburton,34
D. Waters,31M. Weinberger,54J. Weinelt,27W.C. Wester III,18B. Whitehouse,57D. Whitesonf,46A.B. Wicklund,2
E. Wicklund,18S. Wilbur,14G. Williams,34H.H. Williams,46P. Wilson,18B.L. Winer,40P. Wittichh,18
S. Wolbers,18C. Wolfe,14H. Wolfe,40T. Wright,35X. Wu,21F. W¨ urthwein,10A. Yagil,10K. Yamamoto,42
J. Yamaoka,17U.K. Yangr,14Y.C. Yang,28W.M. Yao,29G.P. Yeh,18K. Yio,18J. Yoh,18K. Yorita,58T. Yoshidal,42
G.B. Yu,17I. Yu,28S.S. Yu,18J.C. Yun,18A. Zanetti,55Y. Zeng,17X. Zhang,25Y. Zhengd,9and S. Zucchellidd6
(CDF Collaboration†)
1Institute of Physics, Academia Sinica, Taipei, Taiwan 11529, Republic of China
2Argonne National Laboratory, Argonne, Illinois 60439
3University of Athens, 157 71 Athens, Greece
4Institut de Fisica d’Altes Energies, Universitat Autonoma de Barcelona, E-08193, Bellaterra (Barcelona), Spain
5Baylor University, Waco, Texas 76798
6Istituto Nazionale di Fisica Nucleare Bologna,
7Brandeis University, Waltham, Massachusetts 02254
8University of California, Davis, Davis, California 95616
9University of California, Los Angeles, Los Angeles, California 90024
10University of California, San Diego, La Jolla, California 92093
11University of California, Santa Barbara, Santa Barbara, California 93106
12Instituto de Fisica de Cantabria, CSIC-University of Cantabria, 39005 Santander, Spain
13Carnegie Mellon University, Pittsburgh, Pennsylvania 15213
14Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637
15Comenius University, 842 48 Bratislava, Slovakia; Institute of Experimental Physics, 040 01 Kosice, Slovakia
16Joint Institute for Nuclear Research, RU-141980 Dubna, Russia
17Duke University, Durham, North Carolina 27708
18Fermi National Accelerator Laboratory, Batavia, Illinois 60510
19University of Florida, Gainesville, Florida 32611
20Laboratori Nazionali di Frascati, Istituto Nazionale di Fisica Nucleare, I-00044 Frascati, Italy
21University of Geneva, CH-1211 Geneva 4, Switzerland
22Glasgow University, Glasgow G12 8QQ, United Kingdom
23Harvard University, Cambridge, Massachusetts 02138
24Division of High Energy Physics, Department of Physics,
University of Helsinki and Helsinki Institute of Physics, FIN-00014, Helsinki, Finland
25University of Illinois, Urbana, Illinois 61801
26The Johns Hopkins University, Baltimore, Maryland 21218
ddUniversity of Bologna, I-40127 Bologna, Italy
Page 3
3
27Institut f¨ ur Experimentelle Kernphysik, Karlsruhe Institute of Technology, D-76131 Karlsruhe, Germany
28Center for High Energy Physics: Kyungpook National University,
Daegu 702-701, Korea; Seoul National University, Seoul 151-742,
Korea; Sungkyunkwan University, Suwon 440-746,
Korea; Korea Institute of Science and Technology Information,
Daejeon 305-806, Korea; Chonnam National University, Gwangju 500-757,
Korea; Chonbuk National University, Jeonju 561-756, Korea
29Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, California 94720
30University of Liverpool, Liverpool L69 7ZE, United Kingdom
31University College London, London WC1E 6BT, United Kingdom
32Centro de Investigaciones Energeticas Medioambientales y Tecnologicas, E-28040 Madrid, Spain
33Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
34Institute of Particle Physics: McGill University, Montr´ eal, Qu´ ebec,
Canada H3A 2T8; Simon Fraser University, Burnaby, British Columbia,
Canada V5A 1S6; University of Toronto, Toronto, Ontario,
Canada M5S 1A7; and TRIUMF, Vancouver, British Columbia, Canada V6T 2A3
35University of Michigan, Ann Arbor, Michigan 48109
36Michigan State University, East Lansing, Michigan 48824
37Institution for Theoretical and Experimental Physics, ITEP, Moscow 117259, Russia
38University of New Mexico, Albuquerque, New Mexico 87131
39Northwestern University, Evanston, Illinois 60208
40The Ohio State University, Columbus, Ohio 43210
41Okayama University, Okayama 700-8530, Japan
42Osaka City University, Osaka 588, Japan
43University of Oxford, Oxford OX1 3RH, United Kingdom
44Istituto Nazionale di Fisica Nucleare, Sezione di Padova-Trento,
45LPNHE, Universite Pierre et Marie Curie/IN2P3-CNRS, UMR7585, Paris, F-75252 France
46University of Pennsylvania, Philadelphia, Pennsylvania 19104
47Istituto Nazionale di Fisica Nucleare Pisa,
ggUniversity of Siena and
48University of Pittsburgh, Pittsburgh, Pennsylvania 15260
49Purdue University, West Lafayette, Indiana 47907
50University of Rochester, Rochester, New York 14627
51The Rockefeller University, New York, New York 10021
52Istituto Nazionale di Fisica Nucleare, Sezione di Roma 1,
iiSapienza Universit` a di Roma, I-00185 Roma, Italy
53Rutgers University, Piscataway, New Jersey 08855
54Texas A&M University, College Station, Texas 77843
55Istituto Nazionale di Fisica Nucleare Trieste/Udine,
I-34100 Trieste,
56University of Tsukuba, Tsukuba, Ibaraki 305, Japan
57Tufts University, Medford, Massachusetts 02155
58Waseda University, Tokyo 169, Japan
59Wayne State University, Detroit, Michigan 48201
60University of Wisconsin, Madison, Wisconsin 53706
61Yale University, New Haven, Connecticut 06520
62Carnegie Mellon University, Pittsburgh, PA 15213
eeUniversity of Padova, I-35131 Padova, Italy
ffUniversity of Pisa,
hhScuola Normale Superiore, I-56127 Pisa, Italy
jjUniversity of Trieste/Udine, I-33100 Udine, Italy
We present a search for standard model (SM) Higgs boson production using pp collision data at
√s = 1.96 TeV, collected with the CDF II detector and corresponding to an integrated luminosity
of 4.8fb−1. We search for Higgs bosons produced in all processes with a significant production rate
and decaying to two W bosons. We find no evidence for SM Higgs boson production and place
upper limits at the 95% confidence level on the SM production cross section (σH) for values of the
Higgs boson mass (mH) in the range from 110 to 200 GeV. These limits are the most stringent for
mH > 130 GeV and are 1.29 above the predicted value of σH for mH = 165 GeV.
PACS numbers: 14.80.Bn, 13.85.Rm
∗Deceased
†With visitors from
aUniversity of MassachusettsAmherst,
Amherst, Massachusetts 01003,bUniversiteit Antwerpen, B-2610
Page 4
4
The standard model (SM) of particle physics unifies
the electromagnetic and weak interactions into a single
electroweak theory. However, experimental evidence and
calculations in the framework of the SM show a differ-
ence of orders of magnitude in the cross section of elec-
tromagnetic and weak interactions at low energy. This
fundamental difference is explained by the masses of the
weak W and Z intermediate bosons that mediate the
weak interactions. These massive bosons are a result of
electroweak symmetry breaking, which in the SM occurs
through the Higgs mechanism. This theory is directly
testable by the experimental observation of the Higgs
boson, which is one of the primary objectives of mod-
ern particle physics. The production of Higgs bosons is
expected to be observable at the Tevatron [1] where the
Higgs boson has a large enough cross section as calcu-
lated at next-to-next-to-leading order (NNLO) [2–4] for
exclusions or evidence to be seen with current datasets.
In this Letter we present a search for the production
of SM Higgs bosons with subsequent decay to two oppo-
sitely charged W(∗)bosons, where the asterisk indicates
that W bosons can be virtual. This search is most sensi-
tive at high SM Higgs boson mass, mH> 135 GeV [5],
where the Higgs boson decay to W bosons is domi-
nant [6]. Previous published searches for high-mass SM
Higgs bosons set upper limits at the 95% confidence level
(C.L.) on the production cross section for a SM Higgs bo-
son (σH) of at best 1.7 times greater than the predicted
value [7]. The DØ collaboration is concurrently report-
ing an updated search of comparable sensitivity in this
channel [8]. The results presented here improve the sen-
sitivity of previous published searches by including new
data, new search topologies, and by performing an inclu-
Antwerp, Belgium,
United Kingdom,dChinese Academy of Sciences, Beijing 100864,
China,eIstituto Nazionale di Fisica Nucleare, Sezione di Cagliari,
09042 Monserrato (Cagliari), Italy,
Irvine, Irvine, CA 92697,
Santa Cruz, CA 95064,
hCornell University, Ithaca, NY 14853,
iUniversity of Cyprus, Nicosia CY-1678, Cyprus,jUniversity Col-
lege Dublin, Dublin 4, Ireland,kUniversity of Edinburgh, Edin-
burgh EH9 3JZ, United Kingdom,lUniversity of Fukui, Fukui City,
Fukui Prefecture, Japan 910-0017,
Osaka City, Japan 577-8502,nUniversidad Iberoamericana, Mex-
ico D.F., Mexico,
pKansas State University, Manhattan, KS 66506,qQueen Mary,
University of London, London, E1 4NS, England,
of Manchester, Manchester M13 9PL, England,
Batavia, IL 60510,
tNagasaki Institute of Applied Science, Na-
gasaki, Japan,
uUniversity of Notre Dame, Notre Dame, IN
46556,vObninsk State University, Obninsk, Russia,wUniversity
de Oviedo, E-33007 Oviedo, Spain,xTexas Tech University, Lub-
bock, TX 79609,yIFIC(CSIC-Universitat de Valencia), 56071 Va-
lencia, Spain,zUniversidad Tecnica Federico Santa Maria, 110v
Valparaiso, Chile,
aaUniversity of Virginia, Charlottesville, VA
22906,bbBergische Universit¨ at Wuppertal, 42097 Wuppertal, Ger-
many,
ccYarmouk University, Irbid 211-63, Jordan,
from J. Stefan Institute, Ljubljana, Slovenia,
cUniversity of Bristol, Bristol BS8 1TL,
fUniversity of California
gUniversity of California Santa Cruz,
mKinki University, Higashi-
oUniversity of Iowa, Iowa City, IA 52242,
rUniversity
sMuons, Inc.,
kkOn leave
sive search for all SM Higgs boson production processes
with significant rate: gluon-gluon fusion through virtual-
quark loops (ggH) [9, 10]; production in association with
a W or Z vector boson (VH) [11–13]; and vector bo-
son fusion (VBF) [11, 14].
these processes at mH= 160 GeV are σggH= 0.439 pb,
σWH= 0.051 pb, σZH= 0.033 pb, and σVBF= 0.039 pb.
This inclusive search expands the acceptance by 50% for
mH= 160 GeV compared to searching for only the ggH
production process as done previously by CDF [7].
The CDF II detector consists of a solenoidal spec-
trometer with a silicon tracker and an open cell drift-
chamber (COT) surrounded by calorimeters and muon
detectors [15].The geometry is characterized using
the azimuthal angle φ and the pseudorapidity η ≡
−ln[tan(θ/2)], where θ is the polar angle relative to the
proton beam axis. Transverse energy, ET, is defined to
be E sinθ, where E is the energy of an electromagnetic
(EM) and hadronic calorimeter energy cluster. Trans-
verse momentum, pT, is the track momentum component
transverse to the beam line.
This analysis uses physics objects identified as jets,
electrons, and muons as well as the estimated missing
transverse energy. Electron and muon candidates (called
electrons and muons for simplicity) are typically identi-
fied using the COT and EM calorimeter or muon cham-
bers respectively and are described in detail below. Jet
candidates (jets) are measured using the calorimeter tow-
ers with corrections to improve the estimated energy [16]
and are required to have a measured ET greater than
15 GeV and |η| < 2.5. The missing transverse energy
vector,?E /T, is defined as the opposite of the vector sum
of the ET of all calorimeter towers, corrected to produce
the correct average calorimeter response to jets and for
the calorimeter response to muons.
The search is based on the requirement that events
contain two charged leptons resulting from the decays of
the final-state vector bosons. These leptons have oppo-
site charge except in the case of the VH channel where
they can have the same charge. We also make require-
ments on the E /T(explained below), which is indicative
of the presence of neutrinos, in opposite-charge di-lepton
events. The Higgs boson signature can also involve jets
of hadrons produced from the decay of one of the vector
bosons in the VH process, forward quarks in the VBF
process, or from the radiation of gluons.
One lepton must be identified by a trigger which per-
forms real time selection of electrons or muons. One elec-
tron trigger requires an EM energy cluster in the central
calorimeter (|η| < 1.1) with ET > 18 GeV pointed to by
a COT track with pT> 8 GeV. A second electron trigger
requires an EM energy cluster with ET > 20 GeV in the
forward calorimeter (1.2 < |η| < 2.0) and uncorrected
E /T> 15 GeV. Muon triggers are based on track seg-
ments in the muon chambers that are matched to a COT
track with pT > 18 GeV. Trigger efficiencies are mea-
The SM values of σH for
Page 5
5
sured using samples of observed leptonic Z decays [17].
The selected events consist primarily of background
SM processes from three categories.
gory contains processes that like the signal result in two
charged leptons, E /T, and possible jets, such as two W
bosons contributed by direct production (WW), produc-
tion of two Z bosons (ZZ) where one Z boson decays to
neutrinos, and top-quark pair production (t¯t) where the
W bosons from top-quark decay subsequently decay lep-
tonically. The second category consists of processes such
as Drell-Yan (DY) production with possible jets where
the observed E /Toriginates from the mis-measurement
of lepton or jet energies. Also in this category are ZZ
and WZ production where one or more of the final state
charged leptons are unobserved. The third category in-
cludes W+jets (Wj) and Wγ production where a final
state jet or gamma is misidentified as a charged lepton.
The first cate-
Higgs boson candidates are selected and contributions
from the last two categories of background are reduced
by applying the following initial selection. At least one
charged lepton is required to match the lepton found
in the trigger and have ET(pT) > 20 GeV for electrons
(muons). The second charged lepton is required to
have ET(pT) > 10 GeV except in events with same
charge leptons, where both leptons are required to
have ET(pT) > 20 GeV. To reduce backgrounds from
processes resulting in objects misidentified as charged
leptons from vector boson decay (fake leptons), we
employ a modified version of the lepton identification
strategy developed for the WZ observation analy-
sis [7, 18]. Candidate leptons are separated into seven
categories: two for electrons; four for muons; and one
for isolated tracks that project to detector regions with
insufficient calorimeter coverage for energy measure-
ments.The electron categories are distinguished by
whether the electron is found using the central or the
forward calorimeter. Electrons are further purified by
a likelihood selection based on track quality, track-
calorimeter matching, calorimeter energy, calorimeter
profile shape, and isolation information.
muon categories use muons found in the central or
forward muon chambers and the other two use tracks
consistent with originating from minimum ionizing
particles in either the central or forward calorimeters.
Leptons are selected to be isolated by requiring that
the sum of the ET for the calorimeter towers (or for
central muons the sum of track momenta) in a cone of
∆R =
?(∆η)2+ (∆φ)2< 0.4 around the lepton is less
than 10% of the electron ET (muon pT). Backgrounds
involving mis-measured E /Tare reduced by requiring
E /T,rel> 25 GeV for di-electrons, di-muons or events in-
volving isolated tracks and E /T,rel> 15 GeV for electron-
muon events, where E /T,rel
π
2,E /Tsin∆φE /T,(ℓ,jet)if ∆φE /T,(ℓ,jet)
∆φE /T,(ℓ,jet) is the angle between the
Two of the
≡E /Tif ∆φE /T,(ℓ,jet)
<
?E /T
>
π
2,
direction
and
and the nearest lepton or jet. The E /T,relselection is not
applied for same charge lepton events since mis-measured
E /Tbackgrounds are not large. We reduce DY and heavy
flavor backgrounds by requiring that the invariant mass
of the lepton pair be greater than 16 GeV.
We further subdivide the observed events into six anal-
ysis channels based on jet multiplicity, lepton categories,
and lepton charge combinations. The division is designed
to optimize the sensitivity to the various Higgs boson pro-
duction mechanisms [19]. Five of the channels have sig-
natures with opposite-charge leptons. Events with zero
jets and two central leptons are most sensitive to the
leading order (LO) ggH process and have WW produc-
tion as the dominant background. Events with zero jets,
in which one lepton is identified as a forward electron or
forward minimum ionizing track have an additional sig-
nificant background from fake lepton sources. As in the
zero jet case, we define two categories with one jet which
are additionally sensitive to VH and VBF Higgs boson
production. Events with two or more jets with any com-
bination of opposite-charge leptons can originate from
any Higgs boson production process and have t¯t as the
dominant background. To reduce the tt background we
reject events with b-quark jets [20], which are identified
by finding displaced vertices from tracks in the jets. We
define a separate channel for same charge di-lepton events
with one or more jets. Here we exclude forward electrons
as the charge misidentification rate in the forward region
is high. This category consists of signal events from VH
production, where one lepton originates from the associ-
ated vector boson decay, and Wj events, where the jet is
misidentified as a lepton. In addition to extended accep-
tance for VH and VBF production the final two channels
add search topologies which are new compared to Ref. [7].
The acceptances, efficiencies and kinematic proper-
ties of the signal and background processes are deter-
mined primarily using simulation. Events are simulated
with the MC@NLO program for WW [21], pythia for
H → WW(∗), DY, WZ, ZZ, and tt [22], and the gener-
ator described in Ref. [23] for Wγ. The response of the
CDF II detector is then estimated with a geant-based
simulation [24]. The cross sections for each process are
normalized to NNLO calculations with logarithmic re-
summation (ggH [9, 10]), NNLO (VH [11–13] and tt for
a top-quark mass of 172.4 GeV [25]), and next-to-leading
order calculations (VBF [11, 14], WW [21], WZ and
ZZ [26], and Wγ [27]). Efficiency corrections for the
simulated CDF II detector response for lepton, photon
conversion, and b-jet reconstruction and identification are
determined using samples of observed Z → ℓ+ℓ−, photon
conversions, and b-jets events, respectively. The proba-
bility that a jet will be misidentified as a lepton is mea-
sured using a sample of observed events collected with
jet-based triggers and corrected for the contributions of
leptons from W and Z decays. These probabilities are
applied to each jet in a Wj enriched sample to estimate
Page 6
6
the number of Wj events that pass the selection [28].
Based on the selection described above we expect 594
± 63 WW, 97 ± 13 WZ and ZZ, 196 ± 32 t¯t, 339 ± 61
DY, and 404 ± 72 Wγ and Wj events, for a total of 1630
± 140 estimated background events. As an example, for
a SM Higgs boson with mH= 160 GeV we expect 21.5 ±
4.7 ggH, 4.38 ± 0.57 WH, 1.59 ± 0.21 ZH, and 1.61 ± 0.26
VBF events, for a total of 29.1 ± 4.9 Higgs boson events.
We observe 1648 events. The indicated uncertainties are
systematic and are described below.
After the initial selection the proportion of expected
signal versus background is not sufficient to allow a sig-
nificant result to be extracted quantifying the amount
of signal present. Discrimination of signal from back-
ground is greatly enhanced by employing multivariate
techniques. We train neural networks (NN) using the
Neurobayes [29] program with a combination of back-
ground events and simulated signal events for each anal-
ysis channel and at each of 14 hypothesized mH values
in the range 110 ≤ mH ≤ 200 GeV. The inputs to the
NNs are based on kinematic quantities selected to ex-
ploit features such as the spin correlation between the W
bosons in Higgs boson decay, which results in the charged
leptons from the W decays tending to be more collinear
than in WW events; the presence of large E /Tfrom the
neutrinos; the transverse mass of the Higgs boson, which
can be reconstructed from the leptons’ four-momenta and
?E /T; and the modest total energy of the Higgs boson de-
cay products compared to tt decay [19]. In the zero jet
categories we additionally classify each event by evaluat-
ing the observed kinematic configuration in a likelihood
ratio of the signal probability density divided by the sum
of the signal and background probability densities. These
probability densities are determined from LO matrix el-
ement calculations of the cross sections [18, 28].
An example NN discriminant distribution for the com-
bination of all categories is shown in Fig. 1. Signal and
the a-priori background expectations for a 160 GeV Higgs
boson are shown compared to the observed data.
We do not observe a significant excess of events and set
upper limits at the 95% C.L. on σH, expressed as a ratio
to the expected SM rate as a function of mH. We employ
a Bayesian technique [30] using a likelihood function con-
structed from the joint Poisson probability of observing
the data in each bin of the discriminant NN output vari-
ables in each channel, integrating over the uncertainties
of the normalization parameters using Gaussian priors.
A constant prior in the signal rate is assumed.
When setting these limits we consider a variety of pos-
sible systematic effects including both those that change
the normalization and those that change the shape of
the kinematic distributions. The dominant systematic
uncertainties are those on the theory predictions for the
cross sections of signal and background processes and for
the data driven background estimate used for Wj. In ad-
dition, we consider the effect of variations from choices
-1 -1-0.8 -0.6 -0.4 -0.2 -0.8 -0.6 -0.4 -0.200 0.2 0.2
Neural Network Output
0.4 0.40.6 0.60.8 0.811
00
50 50
100100
150 150
200200
250250
300300
350350
WW
WZ,ZZ
t t
DY
W+
Higgs
Data
,jet
γ
10
×
= 160 GeV
H
m
Events / 0.05
FIG. 1: The combined distribution of NN scores for back-
grounds and a mH = 160 GeV Higgs boson compared to the
observed data shown with statistical uncertainties. The Higgs
boson distribution is normalized to ten times the SM expec-
tation.
of renormalization and factorization scales, parton dis-
tribution function uncertainties, and differences between
LO and higher order calculations on the acceptance of
signal and background processes. The uncertainties on
σH are 5% for WH and ZH, and 10% for VBF. We es-
timate an additional channel-dependent uncertainty for
the ggH process of approximately 7 − 70%, to account
for scale variation cross section and acceptance uncer-
tainties as a function of the number of identified jets,
and a gluon PDF error of 8% following phenomenolog-
ical NNLO studies [31]. The cross section uncertainties
are 6% for diboson production, 10% for tt production,
and 5% for DY. We estimate an acceptance uncertainty
to account for kinematic differences between generating
at LO and higher order of 10% for all simulated processes
except WW, DY, and ggH. We simulate the WW pro-
cess at higher order and assess a smaller uncertainty of
5%. The jet multiplicity and E /Tdistributions for the
DY process are not well modeled by the simulation and
we assess uncertainties from 17−32% depending on chan-
nel. We assess uncertainties of 20% and approximately
20−30%, depending on channel, on Wγ and Wj back-
grounds respectively, due to our modeling of conversion
and fake lepton backgrounds. We also consider uncer-
tainties on lepton identification and trigger efficiencies,
which range from 1.4 to 3.4%. Finally, we assess a 5.9%
uncertainty on the integrated luminosity.
In Table I and Fig. 2 we show the median expected and
observed upper limits on σH for 14 mH hypotheses cal-
culated using the techniques and uncertainties explained
above for the combination of all analysis categories.
In conclusion, we have performed an inclusive search
for SM Higgs boson production in the two W boson decay
mode where the final state contains two charged leptons.
We observe no evidence for SM Higgs boson production
and set upper limits on σH. These limits are the most
Page 7
7
mH (GeV)
Expected/σSM 26.27 8.85 4.41 2.85 2.43 2.05 1.67
Observed/σSM 38.89 12.04 6.38 4.21 3.23 2.62 2.04
mH (GeV)160165
Expected/σSM 1.26 1.20 1.44 1.72 2.09 3.24 4.53
Observed/σSM 1.341.29 1.69 1.94 2.24 4.06 6.74
110 120 130 140 145 150 155
170 175 180 190 200
TABLE I: Median expected and observed 95% C.L. upper
limits on σH presented as a ratio to the predicted SM values
of σH as a function of mH.
110110 110 120120120 130130130 140140 140 150150150 160 160160170170 170 180 180180190 190190200 200 200
1
10
2
10
Higgs Mass (GeV)
SM
σ
95% C.L./
-1
L = 4.8 fb
∫
Standard Model
Expected
σ
1
±
σ
2
±
Observed
FIG. 2: Expected and observed upper limits at the 95% C.L.
on σH presented as a ratio to the predicted SM values as
a function of mH. The dashed line represents the median
expected limits, the green and yellow bands the estimated
one and two sigma probability bands for the distribution of
expectations, and the solid line the observed limit.
stringent to date from a single experiment for high mass
SM Higgs boson production. We limit (at the 95% C.L.)
SM Higgs boson production to be no larger than 1.34 and
1.29 times the expected SM cross sections for mH= 160
and mH= 165 GeV, respectively.
We thank the Fermilab staff and the technical staffs
of the participating institutions for their vital contribu-
tions. This work was supported by the U.S. Department
of Energy and National Science Foundation; the Italian
Istituto Nazionale di Fisica Nucleare; the Ministry of
Education, Culture, Sports, Science and Technology of
Japan; the Natural Sciences and Engineering Research
Council of Canada; the National Science Council of the
Republic of China; the Swiss National Science Founda-
tion; the A.P. Sloan Foundation; the Bundesministerium
f¨ ur Bildung und Forschung, Germany; the World Class
University Program, the National Research Foundation
of Korea; the Science and Technology Facilities Coun-
cil and the Royal Society, UK; the Institut National de
Physique Nucleaire et Physique des Particules/CNRS;
the Russian Foundation for Basic Research; the Minis-
terio de Ciencia e Innovaci´ on, and Programa Consolider-
Ingenio 2010, Spain; the Slovak R&D Agency; and the
Academy of Finland.
[1] T. Han and R.-J. Zhang, Phys. Rev. Lett. 82, 25 (1999).
[2] R. V. Harlander and W. B. Kilgore, Phys. Rev. Lett. 88,
201801 (2002).
[3] C. Anastasiou and K. Melnikov, Nucl. Phys. B646, 220
(2002).
[4] V. Ravindran, J. Smith, and W. L. van Neerven, Nucl.
Phys. B665, 325 (2003).
[5] We use natural units where c and ? are taken as unity and
momentum and mass are referred to in units of energy.
[6] A. Djouadi, J. Kalinowski, and M. Spira, Comput. Phys.
Commun. 108, 56 (1998).
[7] T. Aaltonen et al. (CDF Collaboration), Phys. Rev. Lett.
102, 021802 (2009).
[8] V. M. Abazov et al. (DØ Collaboration), Phys. Rev. Lett.
104, 061804 (2010).
[9] D. de Florian and M. Grazzini, Phys. Lett. B674, 291
(2009).
[10] C. Anastasiou, R. Boughezal, and F. Petriello, J. High
Energy Phys. 04, 003 (2009).
[11] K. A. Assamagan et al. (Higgs Working Group),
arXiv:0406152 [hep-ph] (2004).
[12] O. Brein, A. Djouadi, and R. Harlander, Phys. Lett.
B579, 149 (2004).
[13] M. L. Ciccolini, S. Dittmaier, and M. Kramer, Phys. Rev.
D68, 073003 (2003).
[14] E. L. Berger and J. M. Campbell, Phys. Rev. D70,
073011 (2004).
[15] D. Acosta et al. (CDF Collaboration), Phys. Rev. D71,
032001 (2005).
[16] A. Bhatti et al., Nucl. Instrum. & Methods A566, 375
(2006).
[17] A. Abulencia et al. (CDF Collaboration), J. Phys. G34,
2457 (2007).
[18] A. Abulencia et al. (CDF Collaboration), Phys. Rev.
Lett. 98, 161801 (2007).
[19] D. Hidas, Ph.D. thesis, Duke University (Fermilab Re-
port No. FERMILAB-THESIS-2008-83, 2008).
[20] A. Abulencia et al. (CDF Collaboration), Phys. Rev.
Lett. 97, 082004 (2006).
[21] S. Frixione and B. R. Webber, J. High Energy Phys. 06,
029 (2002).
[22] T. Sjostrand, S. Mrenna, and P. Skands, J. High Energy
Phys. 0605, 026 (2006).
[23] U. Baur and E. L. Berger, Phys. Rev. D47, 4889 (1993).
[24] R. Brun, R. Hagelberg, M. Hansroul, and J. Lassalle,
version 3.15, CERN-DD-78-2-REV.
[25] S. Moch and P. Uwer, Nucl. Phys. Proc. Suppl. 183, 75
(2008).
[26] J. M. Campbell and R. K. Ellis, Phys. Rev. D60, 113006
(1999).
[27] U. Baur, T. Han, and J. Ohnemus, Phys. Rev. D57, 2823
(1998).
[28] S.-C. Hsu, Ph.D. thesis, UC, San Diego (Fermilab Report
No. FERMILAB-THESIS-2008-61, 2008).
[29] M. Feindt and U. Kerzel, Nucl. Instrum. & Methods
A559, 190 (2006).
[30] C. Amsler et al. (Particle Data Group), Phys. Lett.
B667, 1 (2008).
Page 8
8
[31] C. Anastasiou, G. Dissertori, M. Grazzini, F. Stockli, and
B. R. Webber, J. High Energy Phys. 08, 099 (2009).
View other sources
Hide other sources
-
Available from Manuel Mussini · 22 Nov 2012
-
Available from arxiv.org